Lesser Spotted Eagle (Clanga pomarina) nest in Zemgalē, Latvia 2023

Lesser Spotted Eagles in Latvia
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Lesser Spotted Eagle (Clanga pomarina) nest in Zemgalē, Latvia 2023

Post by ame »

Lesser Spotted Eagle (Clanga pomarina) nest with Anna and Andris in Zemgalē, Latvia

new topic for the new season. Liz will make introduction here soon. :thumbs:

please wait till then... then i'll close the topic of last season.
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Post by Liz01 »

Lesser Spotted Eagle Nest Anna & Andris

The nest place is located in the region of Zemgalē (English: Semigallia) in southern Latvia, the green part of the map
Image
https://lv.wikipedia.org/wiki/Zemgale

Camera Live stream:
https://www.youtube.com/watch?v=r_Pb5LHc9Zo

Latvijas Dabas fonds on YouTube:
https://www.youtube.com/@LatvijasDabasfondsOnline

Live broadcasts through Dabasdati.lv in one window:
https://dabasdati.lv/lv/cameras/all

Link to Dabasdati forum for further information (in Latvian language):
https://forums.dabasdati.lv/viewtopic.php?f=34&t=4320

More about Lesser Spotted Eagles:
viewforum.php?f=53

Colour ringing of the Spotted Eagles (Aquila pomarina, Aquila clanga and their hybrids) in Europe – a review:
https://www.academia.edu/14957314/Colou ... e_a_review


This nest is located on the western edge of Zemgale. It was found in 2018 when eagles nested successfully and one young bird left the nest. However, as the researchers discovered, it did not experience its first flight to the wintering sites - early 2019, the remains of an adult young bird were found on the ground about 100 meters from the nest. The nest is built in a spruce at a height of 17 meters, in a stable fork of three branches. It is a typical small Lesser Spotted Eagle nest - about half of all LSE nests in Latvia are built in the spruce trees, and a large part of them are built in such places where branches have formed a fork. Judging by the size of the nest and the condition of the material, the nest is at least five years old.

Jānis Ķuze and Jānis Rudzītis placed the camera system at this nest. Thanks for the support of Janis Kažotnieks and Renate Kviese!

The live camera operation at the LSE nest is provided by the Latvian Fund for Nature within the framework of the project "Providing Lesser Spotted Eagle Protection in Latvia" (LIFE AQPOM), which is financially supported by the European Commission LIFE + program and co-financed by the Latvian Environmental Protection Fund Administration.
(translated with the help of Google Translator from Lativian language)

Image The live stream shows nature to viewers as it is. With beautiful moments and with the harshness of nature.
The organizers of the live broadcast do not interfere with natural processes, except when birds are harmed as a result of human activity.


Cainism in lesser spotted eagles:

Author: Bernd-Ulrich Meyburg
The following factors are responsible for Cainism (fatal Cain-and-Abel struggle) in the Lesser Spotted Eagle: 1. The time lapse of several days between the hatching of the two chicks, giving the first-born (Cain or C1) a more or less considerable developmental advantage. 2. Cain's greater weight at the time of hatching. It usually also hatches from the larger egg. 3. The aggressiveness of the chicks towards each other. 4. The acceptance of intimidation by the inferior chick, even when there is virtually no difference in weight (e. g. in translocation experiments), to the extent that this chick hardly ventures to take part in feedings. 5. The scant attention paid by the female to the second chick. given its smaller size and, above all, its greater clumsiness in taking food due to its retarded development, shows that it holds a waning power of attraction. The food supply plays no part in this. At this time lhe nest contains an ample supply of prey. Up to now there has been much disagreement over the meaning of second-egg laying, leading as a rule to the fledging of only one young, and over the significance of Cainism within the framework of evolution in this and other eagle species. None of the attempts to explain it so far published is really convincing. One possible explanation for the phenomenon of Cainism may well be that the species is at an evolutionarily intermediate stage of transition from two-egg to one-egg clutches. For unknown reasons, and in contrast to earlier times, the raising of one young per breeding season is today sufficient to maintain the species. At a later stage in the course of its evolution this species, which at present lays a second egg clearly smaller than the first – one could regard this as vestigial – may well confine itself to laying no more than one egg per clutch.
https://www.researchgate.net/publicatio ... a_pomarina


Season 2024 starts here
viewtopic.php?p=920836#p920836
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Post by Liz01 »

Nest information from previous years

In 2019, a pair of lesser spotted eagles raised one chick, which was given the name Grinch
viewtopic.php?t=972

In 2020, a pair of Lesser spotted eagles raised one chick, which was given the name Namejs The second chick died.
viewtopic.php?t=1005

In 2021, a pair of lesser spotted eagles raised one chick, which was given the name Perle
viewtopic.php?p=789459#p789459

In 2022, a pair of lesser spotted eagles raised one chick, which was given the name Rota
viewtopic.php?p=835307#p835307
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Post by Liz01 »

Important events 2023

12.04.2023 at 6:41 AM -arrival female
12:04.2023 at 1:24 PM - arrival male

18.04.2023 Male brings the first gift for female
viewtopic.php?p=895652#p895652

26.04.2023 Andris brings a fish as prey
viewtopic.php?p=897060#p897060

27.04.2023 Anna laid her first Egg at 18:37:31
viewtopic.php?p=897355#p897355


Video by BDrieliņi



01.05.2023 Anna laid her second egg
viewtopic.php?p=898258#p898258

05.06.2023 at 10:23 the first eaglet hatched
viewtopic.php?p=902818#p902818

08.06.2023 at 10:23 the second eaglet hatched.Time is not known. But it was already hatched at 4:15 but not dry yet.
viewtopic.php?p=903205#p903205

12.06.2023 #2 died and is brought away
viewtopic.php?p=903729#p903729

01.08.2023 first branching
viewtopic.php?p=908740#p908740

03.08.12 Arturs fledged
viewtopic.php?p=908887#p908887

15. 08.2023 Whole Family on nest
viewtopic.php?p=909837#p909837
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Post by Liz01 »

Inhabitants

Image
©Vērotāja 2019

Visitors


Time of incubation
After 38-41 days' incubation the chicks hatch in the first half of June .The hatching process takes 24-28 hours (Hoffmann 1938, Meyburg 1970).

Oology

The egg and everything
How chicks learn for life before they hatch and some birds don't color their eggs until after Easter.
by Thomas Krumenacker:

viewtopic.php?p=900480#p900480

Migration Juvenile LSE

Orientation of native versus translocated juvenile lesser spotted eagles (Clanga pomarina) on the first autumn migration

Bernd-U. Meyburg,1,* Ugis Bergmanis,2 Torsten Langgemach,3 Kai Graszynski,4 Arno Hinz,5 Ingo Börner,6 Christiane Meyburg,7 and Wouter M. G. Vansteelant8,9

The ontogeny of migration routines used by wild birds remains unresolved. Here we investigated the migratory orientation of juvenile lesser spotted eagles (LSE; Clanga pomarina) based on translocation and satellite tracking. Between 2004 and 2016, 85 second-hatched juveniles (Abels) were reared in captivity for release into the declining German population, including 50 birds that were translocated 940 km from Latvia. In 2009, we tracked 12 translocated juveniles, as well as eight native juveniles and nine native adults, to determine how inexperienced birds come to use strategic migration routes. Native juveniles departed around the same time as the adults and six of eight used the eastern flyway around the Mediterranean, which was used by all adults. In contrast, translocated juveniles departed on average 6 days before native LSEs, and five travelled southward and died in the central Mediterranean region. Consequently, fewer translocated juveniles (4/12) than native juveniles (7/8) reached Africa. We conclude that juvenile LSEs have a much better chance of learning the strategic southeastern flyway if they leave at an appropriate time to connect with experienced elders upon departure. It is not clear why translocated juveniles departed so early. Regardless, by the end of the year, most juveniles had perished, whether they were translocated (10/12) or not (6/8). The small number of surviving translocated juveniles thus still represents a significant increase in the annual productivity of the German LSE population in 2009.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5558239/

Juvenile lesser spotted eagle cannot find migration route to Africa without aid of older birds
Juvenile eagles need older, experienced birds to travel successfully to Africa. This is the conclusion of a German research team in a study on lesser spotted eagles. University of Amsterdam (UvA) researcher Wouter Vansteelant analysed the data of juvenile eagles with satellite tags. Their findings were published on Wednesday, 2 August in the Journal of Experimental Biology.

https://www.uva.nl/en/content/news/pres ... ds.html?cb
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Post by asteria »

So many cones this year. :D
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Post by Liz01 »

:D
Image

they are still far away
Image

https://birdmap.5dvision.ee/EN/
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Post by Liz01 »

March 26

good Morning Zemgale :hi:

we can expect our eagles between April 7th and 12th (2019 arrival 12.4./ 2020 arrival 7.04. / 2021 arrival 12.04 /2022 arrival 11.04 )

8:56 A Goshawk visit the nest. Thank you Trīne
the first visitor as every year... :laugh:
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Image

Image
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Post by Liz01 »

still a Juvenile
Image

Northern Goshawk flight identification and ageing in the UK
http://andybutlerdiaries.blogspot.com/2 ... ation.html

He was sitting on Anna's branch for a few minutes
Image

the video
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Post by Liz01 »

March 30

Good Morning all :hi:

winter wonderland :D Please stay away, eagles
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Post by Liz01 »

March 31

Good Morning Zemgale :hi:

Nest is "snow free"
Image
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Post by Liz01 »

April 3


good Morning everyone :hi:

A ringed goshawk visit the nest. Metal ring on the left. not adult yest. A juvenile, it looks like first plumage
http://andybutlerdiaries.blogspot.com/2 ... ation.html
Image

Image

ring is not readable
Image
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Post by Liz01 »

Video of this visit. He/she was a bit more playful as the other visitor a few days ago
Image

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Post by Liz01 »

April 5th

:hi:

I hope the winter will be over soon
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Post by Liz01 »

April 7

A adult goshawk visit the nest - thank you Lenka Horska :2thumbsup:
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Image

one of Polly's friends :whistling: :laugh:
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Post by Liz01 »

and off he goes
Image

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Post by Polly »

Liz! :D :2thumbsup:
Yes, well, if the H's are no longer to be seen, then others at least.

Beautiful animal ...
"Throw your heart across the river and swim after it."
Indian proverb
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Post by Liz01 »

April 12

Good Morning :hi:
Polly :laugh:

6:41 first LSE has arrived :loveshower: It is Anna :headroll:
Welcome back home
Image

Image

she is calling
Image
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Post by Liz01 »

preening, calling and waiting.. her crop is full.
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Video of her arrival


7:10 she is preening herself
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Post by Liz01 »

7:31 Anna brings twigs and starts nestauration. she is calling every now and then

:innocent:
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